/Engine/Source/Runtime/Engine/Public/MaterialCompiler.h
int32 TextureSample ( int32 Texture, int32 Coordinate, enum EMaterialSamplerType SamplerType, int32 MipValue0Index, int32 MipValue1Index, ETextureMipValueMode MipValueMode, ESamplerSourceMode SamplerSource, int32 TextureReferenceIndex, bool AutomaticViewMipBias, bool AdaptiveVirtualTexture, bool EnableFeedback )